This Tuesday, passengers departing Washington Dulles airport might find something amiss: The noodly-lined security checkpoint area on the departures level of the main terminal is gone. This is not a mirage. The lanes have moved to the new mezzanine level downstairs.

Courtney Mickalonis, a Metropolitan Washington Airports Authority spokeswoman, said this is due to the construction of the new underground train station. "We are phasing in the opening of the new mezzanine level so that people can get used to being screened in a new area," she said.

The two checkpoint areas (east and west) can be reached from both the ticketing and baggage claim levels. For navigational assistance, the airport will post signs saying, "To All Gates." All flight-bound passengers will be screened here, except for those "expert travelers" who use the Dulles Diamond lanes, which will remain on the arrivals level near baggage claim areas 7 and 8.

The Transportation Security Administration has also added four additional lanes for checking passengers, for a total of 24, with the potential for more. As for the much anticipated AeroTrain: It is now in the testing phase, according to Mickalonis. Info: http://www.mwaa.com/dulles.

UPRIGHT AND LOCKED

Frontier, More and Less

Frontier Airlines, which was recently purchased by Republic Airways Holdings, has raised (boo!) and lowered (yippee!) some of its fees. The Denver-based low-fare carrier will increase checked baggage fees to $20 for the first piece and $30 for the second, a $5 spike. But it is lowering reservation-change fees: Holders of economy tickets will pay $100 (down from $150), even for same-day alterations, and Classic passengers will be charged $50, down from $75. The new prices go into effect Oct. 1 and apply to reservations booked on or after Sept. 8. Info: http://www.frontierairlines.com.

ROOM KEYS

Disturbed Guests

Last week, CoGo received a troubling letter from Radisson Hotels and Resorts: Between November and May, the computer systems of some of its North American hotels had been "accessed without authorization" and guests' personal data, such as name and credit or debit card numbers and expiration dates, may have been compromised. The feds are on the case, but in the meantime, the company -- and CoGo -- encourage all past guests to check with their credit card companies and banks for any suspect transactions. For more information, including steps to protect yourself: 866-584-9255, http://www.radisson.com/openletter.